/* ==========================================================================
   TAG Internet - 极光青蓝极客风视觉样式系统
   Color Palette: Deep Titanium Blue (#080d14) & Aurora Cyan (#00f5d4 -> #00bbf9)
   ========================================================================== */

:root {
  --bg-primary: #080d14;
  --bg-secondary: #0d1522;
  --bg-card: rgba(13, 21, 34, 0.75);
  --bg-card-hover: rgba(18, 30, 48, 0.85);
  --bg-glass: rgba(8, 13, 20, 0.82);
  
  --accent-cyan: #00f5d4;
  --accent-blue: #00bbf9;
  --accent-purple: #7928ca;
  --accent-glow: rgba(0, 245, 212, 0.35);
  --accent-glow-strong: rgba(0, 187, 249, 0.5);
  
  --gradient-aurora: linear-gradient(135deg, #00f5d4 0%, #00bbf9 100%);
  --gradient-aurora-hover: linear-gradient(135deg, #05ffe0 0%, #38c8ff 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(0, 245, 212, 0.3) 0%, rgba(0, 187, 249, 0.1) 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 30%, #00f5d4 75%, #00bbf9 100%);
  
  --text-main: #f0f4f8;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 245, 212, 0.22);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(0, 187, 249, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 10% 30%, rgba(0, 245, 212, 0.05) 0%, transparent 40%),
              radial-gradient(circle at 90% 70%, rgba(121, 40, 202, 0.06) 0%, transparent 50%),
              var(--bg-primary);
  line-height: 1.6;
}

/* 装饰性极光光斑网格背景 */
.bg-grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* 文本与排版类 */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.aurora-text {
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0, 245, 212, 0.08);
  border: 1px solid rgba(0, 245, 212, 0.3);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 212, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 245, 212, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 212, 0); }
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 48px;
}

.text-center {
  text-align: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* 按钮交互系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gradient-aurora);
  color: #040910;
  box-shadow: 0 0 24px rgba(0, 245, 212, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

.btn-primary:hover {
  background: var(--gradient-aurora-hover);
  box-shadow: 0 0 35px rgba(0, 245, 212, 0.65), 0 4px 15px rgba(0, 187, 249, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(13, 21, 34, 0.85);
  color: var(--text-main);
  border: 1px solid rgba(0, 245, 212, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(20, 32, 52, 0.95);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 245, 212, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

/* 毛玻璃悬浮导航 Navbar */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-aurora);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #080d14;
  font-weight: 900;
  font-size: 1.15rem;
  box-shadow: 0 0 16px rgba(0, 245, 212, 0.5);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--accent-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-aurora);
  transition: width var(--transition-normal);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 移动端菜单切换按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero 区域 */
.hero-section {
  padding: 100px 0 80px;
  position: relative;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 28px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.stat-number span {
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* 核心优势板块 */
.features-section {
  padding: 90px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-aurora);
  opacity: 0;
  transition: opacity var(--transition-normal);
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 40px rgba(0, 245, 212, 0.12);
  background: var(--bg-card-hover);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(0, 245, 212, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.6rem;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.feature-tag {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* 价格方案对比板块 */
.pricing-section {
  padding: 90px 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 187, 249, 0.05) 0%, transparent 60%);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 245, 212, 0.4);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4), 0 0 25px rgba(0, 245, 212, 0.15);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 28, 48, 0.9) 0%, rgba(10, 18, 30, 0.85) 100%);
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 0 35px rgba(0, 245, 212, 0.25);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 0 50px rgba(0, 245, 212, 0.4);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-aurora);
  color: #040910;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 0 15px rgba(0, 245, 212, 0.5);
}

.plan-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.amount {
  font-size: 3.2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-feature-item svg {
  flex-shrink: 0;
  color: var(--accent-cyan);
}

.plan-feature-item.highlight {
  color: #fff;
  font-weight: 600;
}

/* 技术实测与配置指南（精选专区） */
.articles-section {
  padding: 90px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 40px rgba(0, 245, 212, 0.12);
}

.article-visual {
  height: 200px;
  background: linear-gradient(135deg, #0e1e32 0%, #162b47 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(0, 245, 212, 0.25) 0%, transparent 60%);
}

.article-visual-icon {
  font-size: 3.5rem;
  z-index: 1;
  opacity: 0.9;
  filter: drop-shadow(0 0 15px rgba(0, 245, 212, 0.4));
  transition: transform var(--transition-normal);
}

.article-card:hover .article-visual-icon {
  transform: scale(1.1);
}

.article-meta-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(8, 13, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 245, 212, 0.3);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  z-index: 2;
}

.article-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.article-card:hover .article-card-title {
  color: var(--accent-cyan);
}

.article-card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.article-card-footer span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform var(--transition-fast);
}

.article-card:hover .article-card-footer span {
  transform: translateX(4px);
}

/* 常见问题 FAQ（手风琴） */
.faq-section {
  padding: 90px 0;
}

.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(0, 245, 212, 0.3);
}

.faq-question {
  padding: 22px 26px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
  transition: transform var(--transition-normal);
}

details[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 26px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

/* 用户五星好评板块 */
.testimonials-section {
  padding: 90px 0;
  background: radial-gradient(circle at 50% 30%, rgba(0, 245, 212, 0.04) 0%, transparent 60%);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 35px rgba(0, 245, 212, 0.1);
}

.stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-aurora);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #080d14;
  font-size: 1rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* 转化横幅 CTA Banner */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(13, 21, 34, 0.95) 0%, rgba(18, 30, 48, 0.95) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(0, 245, 212, 0.15);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(0, 245, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 36px;
  position: relative;
  z-index: 1;
}

/* Footer 页脚 */
.site-footer {
  background: #05080d;
  border-top: 1px solid var(--border-light);
  padding: 70px 0 30px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-top: 16px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}

/* 响应式媒体查询 */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta .btn-secondary {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }
  
  .features-grid,
  .pricing-grid,
  .articles-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }
  
  .btn-lg {
    width: 100%;
  }
  
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
}